Rotary engine.



No. 700,423, l Patented May 20, I902.

B. D. HOBBS.

ROTARY ENGINE.

' (Application filed Nov. 29, 1901.) (No Model.) 4 Sheets$heet I.

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No. 700,423. r Paten ted May 20, I902. B. D. HOBBS.

ROTARY ENGINE.

(Application filed Nov. 29, 1901.)

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' No. 700,423. Patented may 2Q, 1902."

B. n. HOBBS.

} ROTARY ENGINE.

(Application filed Nov. 29, 1901.)

(No Model.) 7 4 Sheets-Shag: 4. 1

. UNITED STATES PATENT OFFICE.

BION D. HOBBS, OF EDWARDSVILLE, ILLINOIS, ASSIGNOR OF ONE-HALF TO C. 'A. ROBBINS, OF IVINTERSET, IOIVA.

ROTARY ENGINE.

srnoirrce'rrom formingpart, of LettersPatent No. 700,423, dated 1V I ay20,'1902.'

Application filed November 29, 1901. Serial No. 84,013. (llo model.)

T atZZ whom itmrty concern:

Be it known that I, BION D. Hoses, a citizen of the United States, residing at Ed wardsville, Illinois, have invented a new and useful Rotary Engine, of which the following is a specification.

My object is to construct a rotary engine which will utilize the impact orvelocity force of thesteam and which will also utilize the expansive force of the steam. I My invention consists of a cylinder rigidly mounted, a shaft rigidly and adjustably mounted through said cylinder, a piston-head or abutment rigidly mounted on said shaft in said cylinder, a rotary piston mounted in said shaft and inclosing said abutment and forming an eccentric steam-expansion chamber around said abutment and forming an impactchamber between said piston and said cylin der, Wings slidingly mounted in said. abutment to divide said expansion-chamber,wings extending outwardly from said piston into said impact-chamber, means of leading steamto the impact-chamber, and means of leading steam from the impact-chamber to the expansion-chamber.

- My invention consists, further, of the novel features herein shown,desc ribed,and claimed.

Figure l is a side elevation of a rotary engine embodying the principles of my invention. Fig. 2 is a cross-section onthe line 2 2 of Fig. 1. the line 3 3 of Fig. 2. Fig. 4is an end elevation as seen in looking in the direction indicated by the arrows 4 in Figs. 1 and 3. Fig. 5 is a sectional projection showing the exhaust-ports. Fig. 6 is a sectional projection of the intake-ports.

Referring to the drawings in detail, the piston-cylinder 6 is mounted rigidly on the feet 7. The shaft 8 is adjustably mounted on the posts 9 and held against rotation. The cylindrical body 10 is fixed upon the shaft 8, with its periphery concentric to the shaft,and said body is hollow, and said hollow is divided into four chambers 11, and two pockets 12 are formed in saidbody upon' opposite sides of the shaft, and the slidingvalves 13 are mounted in said pockets and spring-actuated. The cylindrical rotary pisto'nlet is rotatably mounted upon the shaft 8, with its in- Fig. 3 is a longitudinal section on" ternal surface 15 eccentric to the periphery of the body 10 and in position to'be engaged by the sliding valves and with its outer surface 16 concentric to the cylinder 6, and the blades 17 extend outwardly from the "rotary piston to the inner surface of the cylinder 6. The two supply-pipes 18 and 19 are connected to the castings 20 and 21, and said castings are connected to the piston-cylinder 6. The slots 22 and 23 lead from the supply-pipes through the castings into the piston-chambers 24. The supply-pipes are opened and closed alternately to control the direction of the engine. The slots 22 and 23 are thin and are adapted to spread the steam in a thin sheet the whole length of the rotary piston.

The steam-pipes 24 and25 are connected at both ends to theend of the piston-cylinder 6 upon opposite sides of the shaft, said pipesextending from near the shaft radially outwardly to near the periphery of the cylinder. The small disk-shaped valve 25 is embedded into the inner face of the end of the cylinder and has the steam-ports 27 and 28 the same radial distance from the axis of theshaft as the pipes 24. and 25. A groove 29 is formedin the outer face of the end of the rotary piston the same radial distance .from the axis of the shaft as the ports 27 and 8c 28,and a port 31 is formed through said end piece from said gro0ve,and ports 31 are formed through the ends of the body 10 into the chambers 11. A hub 32 extends outwardly from the valve 26, and a rack 34: controls the handle 33, which is attached to the hub and set so that when the handle is at one end of the rack the port 27 registers with the pipe 24 and the pipe 25 is closed, and when the handle is at the other end of the rack the pipe 25 is opened and the pipe 24. is closed. The exhaust-pipe 35 is connected to the end of 'the cylinder 6. A port 36 leads through the end plate. A groove 37 is formed in the inner face of the end plate in connection with port 36. A port 38 is formed through the end of the rotary piston the same radial distance from the axis of the shaft as the groove, and theports 34 lead to the chambers 11. The ports 39 lead from the chambers 11 to the I00 expansion-chambers 4.0 and 41,which are upon opposite sides of the valves or pistons 13.

A hub 4L2 extends from the rotary piston through the end plate of the cylinder 6, and the pulleyet3 is fixed upon the hub and serves as a means of transmitting power.

When steam is admitted through the pipe 18, it passes through the slot 22 and is spread out into a thin sheet which strikes the blades 17 at a tangent to the axis and starts the rotary piston, and then the steam passes through the pipe 25, then through the port 28 to the groove 29, then through the port 30 and to ports 31 to the chambers 11, then through the ports 39 to the chambers 40 or 41. The steam goes first to the chambers 41, and the expansion of the steam against the valves 13 drives the rotarypiston in the same direction as the impact from the slot 22, and when the steam is expanding in the chamber 41 it is exhausting from the chambers 40 through the ports 39, the chambers 11 and the ports 38, the groove 37, the port 36, and the pipe 35. When the lever 33 is shifted to the other end of the rack, the pipe 18 closed, and thepipe 19 opened by the th rottle orcut-oif valves, (not shown,) the direction of the steam and of the engine is reversed.

The inlet-port 30 and the exhaust-port 38 are equal distances apart in both directions and are carried by the rotating body 10, so the action of expansion and exhaustion is the same whether the body rotates one Way or the other. The direction is controlled by opening the pipe 18 and closing the pipe 19, or vice versa.

Especial attention is called to the fact that the sliding valves or pistons 13 are mounted in a casing which is held rigidly against rotation.

I claim A rotary engine comprising a cylinder rigidly mounted; a shaft mounted through the cylinder and held against rotation; a pistonhead or abutment mounted rigidly upon said shaft in said cylinder; a rotarypiston mounted upon said shaft around said abutment and forming an eccentric steam-expansion chambet-around said abutment and forming acoucentric impact-chamber around said piston and means of leading steam to said impactchamber and means of leading steam from said impact-chamber to said expansion-chamber, substantially as specified.

BION D. HOBBS.

Witnesses:

SEMER G. WELLS, FRANCES A. HoovER. 

